对来自红豆杉根的乙醇提取物进行广泛的柱层析,随后通过 HPLC 纯化紫杉烷,得到两种浆果赤霉素 I 衍生物和一种紫杉素衍生物。紫杉类化合物的结构分配基于其光谱数据,包括 2D NMR 实验和化学相关性。1β-羟基浆果赤霉素 I 的 X 射线晶体学分析为其他紫杉烷的结构和相对立体化学提供了明确的表征。
The biotransformation of baccatin VI (1) and 1beta-hydroxybaccatin I (2) with the filamentous fungus Aspergillusniger produced four new taxane diterpenoids taxumairol S(1) (3), taxumairol T(1) (4) and taxumairol S (5), taxumairol T (6), respectively. 1beta-Dehydroxybaccatin VI (7) remained unreacted under the same condition.
Bioactive Taxoids from Japanese Yew Taxus cuspidata and Taxol Biosynthesis
作者:Jun'ichi Kobayashi、Hideyuki Shigemori
DOI:10.3987/rev-97-sr(n)7
日期:——
A series of new taxoids, named taxuspines A similar to H and J similar to Z (1 similar to 25), have been isolated together with 37 known taxoids (26 similar to 62) including taxol (42) from the Japanese yew Taxus cuspidata Sieb. ct Zucc. These new taxoids possessed various skeletons containing 5/7/6, 6/10/6, 6/5/5/6, 6/8/6, or 6/12-membered ring systems. Among the new taxoids, some non-taxol-type compounds remarkably reduced CaCl2-induced depolymerization of microtubules, or increased cellular accumulation of vincristine in multidrug-resistant tumor cells as potent as verapamil. Here we describe our recent results on the isolation, structure elucidation, and bioactivity of these new and known taxoids as well as recent development of taxol biosynthesis.
Taxane Diterpenes from<i>Taxus mairei</i>
作者:Ya-Ching Shen、Ching-Yeu Chen
DOI:10.1055/s-2006-957771
日期:1997.12
In addition to 7-O-deacetyl-1β-hydroxybaccatin I and 9-O-deacetyl-1β-hydroxybaccatin I, a new taxane taxumairol F has been isolated from the ethanolic extracts of the roots of Taxus mairei. Their structures were determined on the basis of spectral evidence and chemical correlation with 1-β-hydroxybaccatin I.
MULTIMERIC PEPTIDE CONJUGATES AND USES THEREOF
申请人:Angiochem Inc.
公开号:EP2448965A1
公开(公告)日:2012-05-09
COMPOSITIONS AND METHODS FOR THE TRANSPORT OF THERAPEUTIC AGENTS